The daughter of Daddy Dodo and Mommy Dodo, Marie is just as muddleheaded as the rest of her family, if a bit more childish. She has a sibling rivalry with Donny Dodo, and seems at best only dimly aware of new foster brother Big Bird. Neither Marie nor Donny can grasp the concept of pretending, and can only pretend to be themselves.

Marie also carries a purple glittery purse, as shown in the scene when the Dodos first appear at the airport.